An uninterruptible power supply, also known as a UPS power supply or backup power supply, is an electrical device that provides power to a load during a power outage. The UPS provides a stable and uninterrupted power supply for personal computers, peripheral devices, network systems, telecommunications equipment, and other power and electronic devices.
First, when there is a power supply, the uninterruptible power output is normal, but the buzzer in the absence of power for a long time, at the same time no output?
Fault analysis: The battery and inverter may fail. The following steps can be used to check:
1. Check the battery voltage to see if it is fully charged. If not, further check whether the fault is the battery or the charging circuit.
2. If the battery voltage is normal, check whether the inverter driver circuit works normally. If the output of the driver circuit is normal, the inverter is faulty.
3. If the inverter driver circuit does not work normally, please check whether the waveform generating circuit has PWM control signal output. If so, the fault is in the inverter drive circuit.
4. If the waveform generating circuit has no PWM control signal output, please check whether the output is blocked by the protection circuit. If so, find out the reason for the protection.
Two, the voltage is low, but the voltage does not rise after charging for more than ten hours?
Fault analysis: The battery or charging circuit may fail. The following steps can be used to check:
1. Check whether the input and output voltage of the charging circuit is normal.
2, if the charging circuit input is normal but the output is abnormal, please disconnect the battery to check again. If it doesn't work, the charging circuit is broken.
3. If the input and output voltage of the charging circuit is normal after the battery is disconnected, it indicates that the battery has been damaged for various reasons, such as long-term no charging and the end of its service life.
